Error with KeyListeners
Here tf1id is Jtextfield,when I implement following code Gives ErrorSource Code-
tf1id.addKeyListener(new KeyAdapter())
{
public void keyTyped(KeyEvent e)
{
String input=tf1id.getText();
Pattern p = Pattern.compile("[A-Z,a-z,&%$#@!()*^]");
Matcher m = p.matcher(input);
if (m.find())
{
//l13.setVisible(true);
//l13.setForeground(new java.awt.Color(255, 100, 100));
tf1.setBackground(new java.awt.Color(255, 100, 100));
JOptionPane.showMessageDialog(null,"Enter Only Number");
}
else
{
//l13.setVisible(false);
tf1.setBackground(Color.white);
}
}
};
Error
StudRec.java:247: <identifier> expected
tf1id.addKeyListener(new KeyAdapter())
^
1 error
View Answers
April 15, 2010 at 3:42 PM
Hi Friend,
Please post your full code. It seems that the problem lies in variable declaration.
Our code was like this:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.regex.*;
class Validation extends JFrame{
JTextField text;
JLabel l1,l2;
JPanel p;
Validation(){
text=new JTextField(15);
l1=new JLabel("ID:");
l2=new JLabel("*Enter only Numeric Value");
p=new JPanel();
p.add(l1);
p.add(text);
p.add(l2);
l2.setVisible(false);
text.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
String input=text.getText();
Pattern p = Pattern.compile("[A-Z,a-z,&%$#@!()*^]");
Matcher m = p.matcher(input);
if (m.find()){
l2.setVisible(true);
l2.setForeground(Color.RED);
}
else{
l2.setVisible(false);
}
}
});
add(p);
setVisible(true);
setSize(300,100);
}
public static void main(String[]args){
Validation v=new Validation();
}
}
Thanks
Please post your full code. It seems that the problem lies in variable declaration.
Our code was like this:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.regex.*;
class Validation extends JFrame{
JTextField text;
JLabel l1,l2;
JPanel p;
Validation(){
text=new JTextField(15);
l1=new JLabel("ID:");
l2=new JLabel("*Enter only Numeric Value");
p=new JPanel();
p.add(l1);
p.add(text);
p.add(l2);
l2.setVisible(false);
text.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
String input=text.getText();
Pattern p = Pattern.compile("[A-Z,a-z,&%$#@!()*^]");
Matcher m = p.matcher(input);
if (m.find()){
l2.setVisible(true);
l2.setForeground(Color.RED);
}
else{
l2.setVisible(false);
}
}
});
add(p);
setVisible(true);
setSize(300,100);
}
public static void main(String[]args){
Validation v=new Validation();
}
}
Thanks
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Error with KeyListeners Here tf1id is Jtextfield,when I implement following code Gives Error Source Code- tf1id.addKeyListener(new KeyAdapter... { //l13.setVisible(false); tf1.setBackground(Color.white); } } }; Error StudRec.java
Error with KeyListeners Here tf1id is Jtextfield,when I implement following code Gives Error Source Code- tf1id.addKeyListener(new KeyAdapter... { //l13.setVisible(false); tf1.setBackground(Color.white); } } }; Error StudRec.java
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